Antiskid device for tires.



R. N. EVANS AL P. T, HAMM.

AN TISKID VDEVICE 'POR TIRES.

Patentevi Dec. 20, 1910.

2 SHEETS-HEBT 1.

R. N. EVANS @L P. T. HAMM.

.ANTISKID DEVICE FOB TIRES.- APPLICATION FILED mm; 4, 1910.

Patented Dec; 20, 1mb.

2 SHEETS-SHEET 2.

.To all 'whom-it' may concern."v

ROBERTv N. EVANS- andjPHiLLir T.HAMiv I,' citizens of the United-1States, residing at.

UNITED sir-Aires' PATENT oFFioE.

.BeY it: know-n.- that` We,

New York, borough of Brooklyn, in the county of Kings and State .usefulImprovementsin Antiskid Devices of New York, have inventedv cer-tain newand .oi"'l`ires of which the following is' a vspecifi- Y cation.

This inventionrelates toanti-skid devices, commonlyknoivn tire 4chainsJfor vehicle i tires and particularly motor vehicle tires,'tl ie vobject of the inventionA being t o provide an .anti-Skid tirechain, madeup of a 'series of cross members," each con'ipris-ing a plurality oflinks so constructed as to insure greater longevity to the chainl iiiuse, and to facili` -tate'theasseniblage-fthereof and in consequence theexpense ofmanufactuie reduced..

LA lfurther 'object of the invention is the provision of an improvedcross mem'ber, each made .up of improved box links.

A/.further object of the inventioiiis Vthe provision of animproved'cross memberfor an anti-skidchain made up of 'a seriesot i'differently, formed links, whereby the asof articulating the 'severallink's', andi Fig.

semblage thereof is facilitated,.and'which 'links may be provided withroughened sur-- faces .to Iincrease the holding lon the roadway. Inthedrawings accompanying' and -forming part' of this specification, Figure.1 is a perspective sectiona 'power vthereof motor vehicle' tire With-oneotthese'iin f gaging side of the proved cross members secured thereto;Fig. 2 is a. perspective Liis a-.rear view' thereof; Fig. 5 vis aperspective View otone of-,thebox links 10 is'azdetail viw illustrating,the. inet-bod link.

plan view of-thetire eli-' cross member;l tig. 3 is a perspective .Viewof theint'ermediate solid. link; Fig.

Similar-characters of reference indicate-v lprises a pair 'narrow 'neckor bent parallelmembers-fare o set or spaced apart, vtheir side edges`14'be'ingf vturned inwardly to engage -each lother to m' 'Bernier N.EvANsANn riunire-fr.. HAMM, -or NEW YORK, N. Y., AssieNoRs 'ro ATLASGHAIN COMPANY. 'or BROOKLYN, NEW YORK, `A CORPORATION. or NEW YORK.

' .AN'risKiD DEVICE Fon 'rin-Es ,sipei'fivction of Lettersra'teat.Patented Dec, 20, 1910, Apiicauoa inea June 4, i910. 'serial No.564,951.

I corresponding parts throughout thedifer-y ent ligures of the drawing.

In the present. improvement the 'tire 2 is provided'With-'theusualsidechains 3', to which all of the several cross 'membersorining theanti-skid cha-in. lare connected hy suitable hooked links 4..

tace of -the 'tire a block link, vand in order that this link have itsgreatest efficiency it is desirable that it be so formed that it willnot slip upon the tire, and for this purpose We have shown the blocklink provided with a'suction chamber on' its rear'side. Each crossmember 5 therefore includes., in the present improvement, a' block'center link It is desirable. lto provide at the center B of thetreadsur- 6, having a roughened tread surface 7, and' is formed with a.pairof laterally extending apertured'ears 8, for connection with. a pairof box. links.v This block link, which islocated midway of theciossmember, is provided `With a chamber 9, at'its reaifside..

forming what maybe considered as a suction chamber yfor preventing theslippage of the link upon the tire. [This suction chainbe'r not onlyaccomplishes this, but also reduces the Weight of the link, While a-tthe saine time 'permitting the use of a block link at the-point ofgreatestv wear..-

`By formi-iig the link with achaniber at its rear side only, instead ofan opening therethrough, the penetrationA of grit and dirt Hat niembe'rs411 'and 12 connected These Jortion 13.

aintain'such parallel portions 'spaced apart. {.Eachof E.theseyrelatively flat` spaced apart portions isprovided with a loop 41 5,split at'one' 'side 'to ermitthe insertion' of the loop into one f the'openings of the 'block link in thehianner .-shown'ini dottedlines' Fig.10, after which vthis'lopend is, suitably connected, as by 'soldering orbrazing. tothe box link,.a s at 16 Fig. 2, the split of the loop beingat one side ltli'ereotto facilitate .this operation. The' ,into Contactwith the tire and the conse? quent damage is ,materiallyprevented.

- 4To-.each side of the Vblock link is connected loop or loops 15l ofeachl boit-formed link-v p'ro'ject beyond the flatv or tread po-rtioi'iof the link and preferably Within the plane of such lat ortread portion,so-that the wear',

V418, communicating -with *the opening 19' formed by its loop 20.The-two outer box links of the cross member. are articulated` with thelinks 15, in themanner shown'in Fig. 10, tha-t is to say,ea'ch link. 17"before its parallel portionsl .are bent into AeI'1gag'e-- nj'ent'l ispassed transversely' through the. longitudinal. slot 1,'8`ofithe link-17until-the neck portion 13 oftheglink' -10"is in juxtaposition to suchslot, whereupon, by shifting'v h he link l0 endwise `in'tothel opening19 of' the link` 17, it. can be-'turned'and then the t'wo '.at portionsvbrought together a manner that `vvill be" readily* understood,

Thus We are able to r'oiide cross member all-readily assembled Withoutanysoldering orbra-zing, out the necessity of having more than two ofthe links provided 'with split loops. y

@From the foregoing. it will lie-observed f that "thefcross memberisniade up of three Vdilierent' formsof li ks, and-this facilitates the.assembl'a'ge of t .e several ylinks ofthe,v

cross member, thus very much simplifyingI the ,cost o'f .manufacture ofthe Itire chain. Itwv'll alsoV bc observed that the loops of theboxlinks-haveV their outer sideedges 21l in alinement-*With' theouter'sides 22 of thebodyof. thelink, thus forming .a continuous,unbroken or u nrecessed surface, 'so that the link 4is as strong at this'pointes at other 1 constructed, the loop portion is so connccted withthe bodyof vthe-link, that after a certain ainonntof Wear the link firstgives away a't thisjuncture point, by. reason of the Yfact that theouter side'edges. of the' loop are. not continiions with the outer sideedges of the link. body, but are-connected with such bod '-at each.siffleiyfa i'ia'rrow'l n'eckvporti'on 5, see Fig.- 11'. lThus When theparallel tread -portion'nof theli'nk hashe- 'conie worn ,awayr the linkbreaksat this weak point, s o that the-life of the link is somewhatshorter than it should .be; lv In order to prevent this, vive khave soformed.. each boX lin-k that its loop is joined there With by acontinuousbroken and u'nrecess'ed 'side surface, so that the lo'op.Willnot breakoif from th'elinkbodyuntil the tread surface ofthe linkhas been 4thoroughly Worn except at two points. and 'With- "ont Byforming the bo'X`;links in the' inan-` andl i n Uthe fornis of 'linksfshownj the 'block ,link is provided Withia series'of ,proj'eotion'slvvfor this p-n'rpose, jivhile the b'oxlinks are' "proyi'ded with a.series oftransversecorru- 'gations pose.

' 'l' t will, also vbe observed that thefpresent' 'Y improvement, theouterv side'sof the 'boxv links' l arecurved,v thnjs forming. -notlonlyavi uch Itzwill beobservedthat the--lolockflink is ,of cross shape Iandcomprisesa'bodyorfceny tra] portion of -Vr'el atively. great gwidtha-n'dbreadth, 'and extensions 'or 4earsl yfor l tile; reception of tlie loopsof adjacent ylifr1l rs,xthese extensions .orlear's being of 'much"'less'- 'vizidth than' the vividth of .the' booly,l so thatlthey' areadapted to receivelthe eyes or lo'opsofthe bfoX links at each sid-ethereof,the openings 4of ,which nia-y be .of less Width than" theinaximnmf Width of .the boX- links. lt "will yalso beobservedi-tl'satthe Width of theblock :or center linkfvconsiderably.greater' than the Width of' thev box links, so'that it pro-4jects beyond the plane of 'the sides lof the box links, By forming'vthe block-xlil'ikof considera blc Width, and of'v ay Width greater thanthe Width-of theboXlinks We obtain several. advantages, .one'of whichis? a considerable 'tread surface centrally of the tire upon the road,another y'agconsiderable protect'ion'vv to th'e tire itself2 since, asthecross chains are' located4 relatively close vtogether i't 'follows"that by making th eyblock-formed linkof greater Width 4than -thebox-.formed l links va greater vsurface ofthe-"tire is' protectedlengthwise 'of the tire as well'as'a greater trea d surface [on theroa'dQ btamQd, so th at the box links may -be,1nade compara# tively. small,as the ',larger proportion of the;

wear' comes z upon.` the-blocklinks: y in addition to theseadvantages-We obtain ai very importantadvantage, in that,`by mak' ingthe `block li'nks of consider .ble Width,

and of greater Width` thanI the links, it

prevents the turningover of 'the chain .on

the tire in' use. Inotiher Words,the rolling thejchain' and vthetu'r'nin'g over thereot upon the' tire" is prevented, since,'a"stheb'lock links are-'of considerable Width `they prol ject 'beyond.theplane off the sides bf, the

boXilinks and act to prevent the turning voverl-of the chain upon .thetire; This thus enables us to form thefbox links ofthe cross lorprojections @for 'the-'sainefflpnrmember-` relatively' small and with"rounded edges Where they engage the tire, since,'.as

Maleo A stated, the formation of the block-.link 'is suoli that .itivillprevent the rolling ot' the boxvlinks or the turning of the crossineni'ber upon the tire. Thus there. are in ipoi'tant advantages inmaking' the block link of cruciform construct-ion.'

-It-'Will also be observed that by forming' anti-skid tire chain,comprising a pair olf spaced and nnlintai'ned apart [iat parallelineinbers having parallel side edges and ronnected by .a bent portionfoi-innig a loop projectingfroin'such flat members and also having at'its opposite endl a loop projecting from such flat. members and havingat .the juncture points thereof with the body po1-` tiontlie suine Widthas suoli body portion7 whereby the outer side edges of tliebody portionandthe juncture -pointsfof the loop at the-,outer sides thereof areflush.

bos 'link lfor a lcross 'rneinber of an ant-i-'skid't e cha-i115vcomprislng, a pair: of

spacedand maintained' apart .flat 'parallel' body portions connected bya bent portion and having a loop projecting from such flat' bodyportions the outer sides of which, are flush with .the outer sides ofthe body'portionsv and also `having a longitudinal slot-v openingintos'uch loop.

3.' A cross member link having :1t-,each side thereof a pluralityintegral loops disposed transversely to each other and each terminal boxlink being similarly foi-ined toits companion box links, butlmving alrmgitudinal.slot= opening into one of its loops,wheieby'the box linksmay be articulated wit-houtl cutting the loops of such i foranualitiskid' tire' 4chain7 comprising a centrally' located block- 4S ofbox links; each 'of said boxllinks having.

box links,.said block link" being articulated by integral loops'Withtlie box links at each side thereof.

RoBEnT N. EvANs. PHILLIP Tl HAMM.

lVit'nesses F. E. Boron,

C. A. WEEn.

